Abdollah Mohajeri
My journey into the world of code didn't start with servers; it started with Game Development. Witnessing the visual impact of my logic was mesmerizing, but as I transitioned into web and software development, I realized that visual beauty is fragile without a robust backbone. Through hands-on experimentation, I discovered a crucial truth: building software is easy, but engineering Scalable, High-Availability Systems that survive Big Data loads is an art. This realization shifted my focus from the 'frontend' to the deep ocean of Backend Engineering. I moved from empirical coding to academic rigor, mastering Architecture Patterns, DDD, and Distributed Systems. Today, with over 8 years of experience, I don't just write code; I design living systems. For me, Software Engineering isn't just a job—it's the pursuit of creating structured, efficient, and resilient solutions using .NET and modern cloud-native practices.
Experience
Senior Software Engineer
Owned the end-to-end architecture and implementation of modular C# applications, focusing on scalable design and technical decision-making.
Software Engineer
Maintained and optimized a large-scale educational platform, ensuring production stability, secure workflows, and efficient content delivery.
Software Engineer (Mobile Products)
Engineered and architected high-performance software products for major marketplaces, focusing on robust business logic and long-term maintainability..
Jonior Software Engineer
Developed core application logic and interactive mechanics using C#, focusing on object-oriented programming and state management fundamentals.
Showcasing My Commercial, Industrial, and Creative Engineering Work
Verified Professional History
Official Activity Confirmation
This document verifies my active role as a Software Developer within a major ecosystem. My applications were published, maintained, and served to millions of users. Working in this high-volume environment exposed me to real-world performance challenges, which ultimately drove my transition into Scalable Backend Architecture and Distributed Systems.
Professional Certifications
Professional Certificate in Enterprise Web Application Development (ASP.NET)
TVTO (Govt. Authority) Training Duration: 400 Hours
Professional Certificate in JavaScript Web Development
TVTO (Govt. Authority) Training Duration: 304 Hours
Technical & Vocational Certificate in C# Windows Application
TVTO (Govt. Authority) Training Duration: 100 Hours
Backend Web Development with PHP
TVTO (Govt. Authority) Training Duration: 130 Hours
Technical & Vocational Certificate in C# Web Application
TVTO (Govt. Authority) Training Duration: 100 Hours
Web Development Fundamentals (HTML/CSS)
TVTO (Govt. Authority) Training Duration: 54 Hours
English Language
Busuu Level: B2
German Language
Busuu Level: B1Education
Bachelor of Accounting
Although my career path evolved into Software Engineering, my academic foundation in Accounting provided me with a critical advantage: Domain Knowledge. I possess a deep understanding of financial workflows, ledger systems, and business logic, which allows me to architect complex Fintech and ERP solutions with precision.
Awards & Recognitions
Editors’ Choice-Major Android Market
MODULAR OOP ARCHITECTURE
2017Designed using strict Object-Oriented principles and decoupled layers. This Clean Architecture approach ensured code maintainability and easy feature scalability.
ENGINEERING EXCELLENCE & ARCHITECTURE
2019Selected by market editors for outstanding stability and performance. Built upon Clean Architecture principles, ensuring maintainability, scalability, and optimized resource usage.
ALGORITHMIC EFFICIENCY
2020Focused on high-speed data retrieval. Utilized optimized algorithms and efficient data structures to render large text datasets with zero latency.
PERFORMANCE & OPTIMIZATION
2020Engineered for maximum efficiency. implemented advanced memory management techniques to handle heavy media assets smoothly on diverse devices.
Top Search & Category Ranking-MARKET LEADERSHIP & SCALABILITY
WIDEST USER ADOPTION
2019These two apps achieved the highest install rate and popularity in the entire category. This was achieved due to clean code implementation and innovative features with minimal memory footprint.
TOP GROSSING DATA ARCHITECTED APP
2020Ranked #1 for multiple key search terms. The robust Data Handling Architecture enabled rapid updates and managed the largest offline data-set library in its category.
#1 KEYWORD SEARCH PERFORMANCE
2018Achieved Rank #1 in category keyword searches across a major national market. Success attributed to highly optimized installation package size and exceptional stability.
Product Impact & Mass User Adoption
6,000,000+ Total Installs
Market Reach & ReliabilityDelivered software with production-grade stability to millions. Engineered a shared core infrastructure ensuring consistent performance across thousands of hardware configurations, meeting high-reliability standards.
2,500,000+ Active Users
High-Load Resource ManagementMaintained a vast user base by optimizing client-side data processing. Applied strict memory management and efficient state-handling patterns to manage high-concurrency logic flawlessly.
Rapid Product Scaling
Sustainable Software EngineeringBeyond just writing code, I designed modular architectures for millions of users, ensuring they are easily scalable, upgradeable, and built for robust long-term maintainability.